Some example CSS for a flattened look like below:
Primary black color can be changed as needed of course, along with the shades of gray...
Haven't looked much at the KB/Additional pages etc, but this is a good start for you.
#header {
padding: 10px!important;
}
#container {
width: auto!important;
}
table {
width: 100%;
}
#nav {
margin: 0 0 10px 0 !important;
padding:0!important;
height:auto!important;
background:none!important;
border-top:0!important;
-moz-box-shadow: none!important;
-webkit-box-shadow: none!important;
box-shadow: none!important;
background-color:#000!important;
}
#nav li a {
background-image:unset!important;
color:#fff!important;
padding:10px!important;
border-radius:0;
-webkit-border-radius:0;
-moz-border-radius:0;
}
#nav li a.active, #nav li a:hover {
background-color: #eee;
color:#000!important;
}
a:hover {
border-bottom:0!important;
}
a {
margin-bottom:0!important;
}
input[type="button"], input[type="reset"], input[type="submit"] {
cursor: pointer;
-webkit-appearance: button;
-moz-appearance: button;
padding: 5px 10px;
border: 1px solid #ccc;
background-color: #eee;
}
input, select, textarea {
border: 1px solid #ccc;
padding: 5px 10px;
color: #444;
}
select {
background-color: #eee;
}
h1,h2,h3,h4,h5,h6 {
color:#555!important;
}
#ticketTable {
margin: 15px 0px;
}
#ticketTable caption {
background: none !important;
border: 0px !important;
font-size:85%;
}
#ticketTable th {
background: #eee!important;
border: 1px solid #ccc!important;
padding: 5px 10px!important;
}
#ticketTable td {
border: 1px solid #ccc!important;
padding:5px 10px!important;
}
.button {
-webkit-border-radius:0;
-moz-border-radius:0;
border-radius:0;
-moz-box-shadow: none!important;
-webkit-box-shadow: none!important;
box-shadow: none!important;
}
#landing_page .sidebar {
display:none;
}